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Microchip Technology AT25020-10PC
- Part No.:
- AT25020-10PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
AT25020-10PC.pdf
- Description:
- IC EEPROM 2KBIT SPI 3MHZ 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,735
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Product details
Overview
AT25020-10PC from Atmel is a 2-Kbit (256 × 8) SPI serial EEPROM with 2.7V–5.5V operation, 2.1 MHz clock support, 8-byte page write capability, and hardware/software write protection via WP pin and status register. It operates in SPI modes 0 and 3 and is used for nonvolatile parameter storage in microcontroller-based industrial control modules.
For engineers reviewing the AT25020-10PC datasheet, AT25020-10PC pinout, AT25020-10PC application, or AT25020-10PC equivalent, key selection criteria include voltage range compatibility (2.7–5.5 V), 10 ms max write cycle time, block write protection granularity (1/4, 1/2, or full array), and PDIP-8 package suitability for through-hole prototyping and legacy industrial PCBs.
Technical Context
The AT25020-10PC implements a synchronous SPI slave interface with separate SI/SO pins, MSB-first data transfer, and CS-driven command framing. Its instruction set includes WREN/WRDI for write-enable control and RDSR/WRSR for status and protection configuration.
It supports three operating voltage ranges (1.8V, 2.7V, 5.0V), but the -10PC suffix specifies the 2.7–5.5 V variant with commercial temperature range (0°C to +70°C) and 8-pin PDIP package. Block protection is implemented via nonvolatile BP1/BP0 bits in the status register, enabling selective locking of memory segments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 2 Kbit (256 words × 8 bits), sufficient for firmware calibration tables or device configuration registers |
| Interface | SPI slave with modes 0 and 3; no external level-shifting needed for 3.3V or 5V MCU hosts |
| Write Cycle Time | Max 10 ms per byte or page; enables deterministic timeout handling in embedded firmware |
| Endurance | 1 million write cycles - supports frequent logging or counter updates over product lifetime |
| Data Retention | 100 years at 25°C - ensures long-term reliability without battery backup |
| Operating Voltage | 2.7 V to 5.5 V - interoperable across mixed-voltage systems including 3.3V logic and 5V legacy peripherals |
| Package | 8-pin PDIP (8P3), 0.300" width - compatible with standard IC sockets and manual soldering workflows |
Pinout & Package
AT25020-10PC uses an 8-pin PDIP (8P3) package with 0.300" body width and standard DIP footprint. Pin 1 is marked by notch or dot; leads are tin-lead plated for RoHS-compliant solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; must be low for instruction/data transfer; high-Z SO when CS high |
| SCK | Serial Clock Input | Master-generated clock; timing defines SPI mode (0 or 3); SCK must be low during HOLD assertion |
| SI | Serial Data Input | Accepts op-codes, addresses, and data; ignored during HOLD or write cycle |
| SO | Serial Data Output | Tri-state output; drives data during READ; high-Z when CS high or during internal write |
| GND | Ground Reference | Return path for VCC and all I/O; requires low-impedance connection to minimize noise coupling |
| VCC | Power Supply | 2.7–5.5 V input; decoupling capacitor (0.1 µF) required within 10 mm of pin |
| WP | Write Protect | Hardware lock: low = disable all writes; overrides software WREN; effective even mid-cycle |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer without resetting sequence; requires SCK low to assert/deassert |
Key Features
| Feature | Design Value |
|---|---|
| 8-byte page write mode | Reduces write overhead by up to 8× vs. byte-wise programming; improves system responsiveness during bulk updates |
| Four-level block write protection | Enables selective locking of top quarter, top half, or entire array via nonvolatile BP1/BP0 bits - prevents accidental corruption of critical boot parameters |
| Dual write protection scheme | Combines hardware (WP pin) and software (WREN + status register) controls - satisfies functional safety requirements for industrial firmware storage |
| Self-timed internal write cycle | Eliminates need for external erase commands or timing-critical polling; simplifies driver implementation in resource-constrained MCUs |
| High-reliability endurance | 1 million write cycles at 25°C - supports daily recalibration or event logging for >27 years without wear-out |
Applications
| Industrial Sensor Calibration Storage | Consumer Appliance Configuration Memory |
|---|---|
|
Use Scenario: Storing factory-calibrated offset/gain coefficients for analog sensor front-ends in programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parameter store accessed during power-up initialization; read-only during runtime unless re-calibration triggered. Use Value: Enables field-upgradable calibration without firmware reflashing; 100-year retention guarantees accuracy across equipment lifecycle. |
Use Scenario: Holding user preferences (temperature setpoints, timer durations, display brightness) in smart thermostats and washing machines. IC Role / Device Role / Timing Role: Low-power standby memory; written infrequently during UI interaction; read on every power cycle. Use Value: 2.7–5.5 V operation matches appliance mainboard rails; 100 µA standby current minimizes battery drain in backup-powered contexts. |
| Medical Device Settings Backup | Automotive Body Control Module (BCM) NVM |
|
Use Scenario: Preserving clinician-configured alarm thresholds and operational modes in portable infusion pumps. IC Role / Device Role / Timing Role: Safety-critical configuration store; write-protected via WP pin during normal operation; updated only via authenticated service mode. Use Value: Hardware + software write protection meets IEC 62304 Class B requirements; 1M endurance supports full-life service recalibration. |
Use Scenario: Storing door lock states, mirror positions, and lighting profiles in automotive BCMs across vehicle production lifecycles. IC Role / Device Role / Timing Role: Automotive-grade EEPROM interfaced to 8-bit MCU via SPI; accessed during ignition-on initialization and state-change events. Use Value: PDIP-8 package allows direct replacement in existing BCM designs; 2.1 MHz clock rate ensures fast parameter loading during cold start. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95256-WMN6TP | 256 Kbit capacity, 5V-only (4.5–5.5 V), 20 MHz SPI, SO8 package | Higher density and speed; unsuitable for 2.7V systems or PDIP layouts | Select if migrating to surface-mount and requiring faster bulk writes |
| 25AA020A-I/P | 2 Kbit, 1.8–5.5 V, 10 MHz SPI, PDIP-8, Microchip AEC-Q100 qualified | Same pinout and memory size; wider voltage range and automotive qualification | Preferred for new automotive designs needing extended temp support and qualification traceability |
Compared with AT25020-10PC, M95256-WMN6TP offers higher bandwidth and density but lacks 2.7V operation and PDIP packaging; 25AA020A-I/P matches pinout and voltage flexibility while adding AEC-Q100 compliance - making it suitable for next-generation automotive or industrial upgrades where qualification is mandatory.
Availability
AT25020-10PC is available at Aetrix Electronics and suitable for industrial control panels, consumer appliance mainboards, medical device configuration storage, and automotive body electronics requiring stable component supply and long-term obsolescence management.
Supply support for AT25020-10PC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Atmel Corporation (now part of Microchip Technology) is a semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and secure authentication ICs for industrial, automotive, and consumer markets.
The AT250xx family was designed for low-power, SPI-compatible EEPROM applications in space-constrained and mixed-voltage embedded systems - emphasizing robustness, ease of integration, and long-term data integrity.
FAQ
What is the maximum clock frequency supported by AT25020-10PC?
The AT25020-10PC supports up to 2.1 MHz SCK frequency at VCC = 4.5–5.5 V, 2.1 MHz at 2.7–5.5 V, and 0.5 MHz at 1.8–3.6 V. For the -10PC variant (2.7–5.5 V), the guaranteed maximum is 2.1 MHz - sufficient for real-time parameter reads in most 8/16-bit MCU systems without introducing timing bottlenecks.
Does AT25020-10PC require an external erase command before writing?
No, AT25020-10PC does not require a separate erase command. Each write operation automatically erases and programs the target byte or page. The device uses self-timed internal write cycles (max 10 ms), eliminating erase/write sequencing complexity in firmware drivers.
Can AT25020-10PC be used with a 3.3V microcontroller without level shifters?
Yes, AT25020-10PC operates from 2.7 V to 5.5 V and has VIH(min) = 0.7 × VCC and VIL(max) = 0.3 × VCC. At VCC = 3.3 V, it accepts 2.31 V as high and 0.99 V as low - fully compatible with standard 3.3V CMOS logic levels without translation circuitry.
How is write protection configured on AT25020-10PC?
Write protection on AT25020-10PC is configured using two methods: (1) hardware via the WP pin (low = all writes disabled), and (2) software via the status register's BP1/BP0 bits, which can lock 1/4, 1/2, or the full memory array. Both mechanisms operate independently and concurrently.
What package type is used by AT25020-10PC?
AT25020-10PC uses an 8-pin Plastic Dual Inline Package (PDIP), designated as 8P3, with 0.300" body width and standard 0.1" lead pitch. This through-hole package supports manual assembly, socket-based testing, and backward compatibility with legacy industrial PCB footprints.
AT25020-10PC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 3 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
AT25020-10PC FAQ
1.How can I place an order for AT25020-10PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25020-10PC on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT25020-10PC reliable?
The price and inventory of AT25020-10PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25020-10PC is usually 5 days.
3.What payment methods are accepted for AT25020-10PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25020-10PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25020-10PC?
AT25020-10PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25020-10PC order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT25020-10PC?
For technical support, including AT25020-10PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25020-10PC requirements.
6.How does Aetrix verify that AT25020-10PC is sourced from the original manufacturer or authorized distributors?
All AT25020-10PC products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT25020-10PC meets industry standards.
7.What is the process for return or replacement of AT25020-10PC?
All AT25020-10PC units undergo pre-shipment inspection (PSI). If there is an issue with AT25020-10PC, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT25020-10PC part is unused and in its original packaging.
Return procedure for AT25020-10PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT25020-10PC Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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